Electrical generator.



W. D. & J. R, PENNINGTON.

ELECTRICAL GENERATOR.

APPLICATION FILED APR. 12, I906- RENEWED MAY 1. l9l2.

Patented Apr. 15, 1919.

the notches. I disk alternate with the teeth of the other in UNITED STATES PATENT OFFICE.

. WILLIAM B. rnmwmoron, or rnnncn LICK, INDIANA, AND JOHN R. rnnnnveron, or

CHICAGO, ILLINOIS.

ELECTRICAL GENERATOR.

To all whom it may concern:

Be it known that we, WILLIAM D. PEN- NINGTON and JOHN R. PENNINGTON, citizens of the United States, residing, respectively, at French Lick, Orange county, Indiana, and at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Electrical Generators, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to generators for the electric current.

The object of the invention is to produce a machine wherein induced currents of electricity are produced by the passage of an inductor in proximity to the poles of electromagnets arranged in the progression hereinafter stated.

Figure 1 is a side elevation of an electrical generator involving the principles of the invention. 1

Fig. 2 is a vertical section, on the line 2-2, Fig. 1.

The numeral 1 indicates a driving shaft, borne in bearings 2' on the driven from pulley 4.

The shaft 1 carries two spaced disk-like inductors, 5 and 50. These inductors are preferably built up of soft iron plates, and

' are secured to shaft 1 so as to rotate therewith. I

The inductors 5 and are notched in their peripheries, the notches being preferably of the same width as the teeth between The notches of one inductor transverse direction, that is, in the line of the driving shaft.

Surrounding the inductors there are a number of electro-magnets.

These magnets are of composite construction, as I will now explain.

A coil of insulated wire 10 surrounds a soft iron core 11, and when the electric current passes through said coil 10 the core 11 becomes a magnet. One end of core 11 is naturally the north pole, and the other end the south pole of such magnetized core.

Specification of Letters Patent.

frame 3, and

Patented A r. 15, 1919. 7, 1m. Serial No. 695,786

The ends of core 11 are in contact with the holding pieces 12 and 13, which pieces 12 and 13, may be of cast iron. A succession of'cores 11 and holding pieces 12 and 13 form a complete ring around the central shaft 1. Such of the holding pieces as are in proximity to the frame 3 may be secured thereto, as by screws 6. The cores may be held to the holders 12 and 13 by set screws 7.

The core 11 are so alternated that two north poles are in contact with opposite sides of one holder, and two south poles are in contact with the next holder 13. Thus holders 12 and 13 are alternately positive and negative magnetic poles.

Yoke or pole pieces 14 and 15 are secured in slots in the holders 12 and 13, as by screws or bolts 8. These yoke piecesare preferably made up of thin plates of soft iron. Their ends form duplex poles near the inductor.

Around each end of yokes 14 and 15 there are coils 16 and '17 of insulated wire supported on suitable pools18. As the yoke 14 is a part of pole piece of a composite magnet of which magnet the yoke 15 isthe other pole, both the coils on' yoke 14 will be of like polarity, while the two coils on yoke 15 will will be opposite a tooth in inductor 5 while the other end will be opposite a notch in inductor 50, and the same will be true as to the yokes 15 with reference to the inductor.

' The ends of the yokes or pole pieces 14 and yokes but not touch them, as the inductor rotates. v I

When the inductor, 5, 50, is rotated, (the coils 10 being then conductors of an electric current) the passage of the inductor teeth past the ends of yokes 14 and 15 brings those inductor teeth into and out of inductive relation with the cores 11, 11. This induces a shifting of the lines of force back and forth in said cores, first to one side and then to the other, referring particularly to Fig. 2. Thus currents are induced in the-coils 16 and 17, and an electric current can be taken from each of said coils. Preferably the coils, 16 and 17, are connected in series, but they may be ofreverse polarity. Oneend of yoke 14 v be connected in multiple, or in any known manner employed in conducting the electric current.

The coils 10 may be charged from any source of electrical energy; The inductors may be driven by any suitable motor.

Each disk of the duplex inductor moves troin' a; pole piece of o1ie polarity toward one: s

of opposite polarity, and one of the duplex poles of like polarity is in proximity to the inductor tooth while the otheri's opposite a notch of the inductor. The rotation ofthe inductor produces exceedingly rapid pulsations, and a large developmentof electric current.

0 course: the same principle may be carried: out with a longer shaiit, and an increased number of inductors and magnets.

By this arrangementit will be seen that the movable member, in this case a rotary duplex inductor,, induces shitting generating; field by acting, inductively on both: ends of the generating coils; the central portions of which are associated with the poles of the ring magnet r V a As the teeth on one: side of the: inductor come: opposite the corresponding: pole: pieces, a magnetic circuit is established through suchiteethi anrli through such polepiece's, and

the ring carrying the coils- 10, so that currents are induced'in the'coils onsuch pole pieces that is to say, currents are induced in the coils 16,;17 on one side of the machine. As these teeth recede from these pole pieces and the teeth: on the-other side of the inductor come opposite the other pole pieces rthat i's-the pole pieces on the other side of the: machine,,magnetic circuits are closed throughsuch other polepieces and the outside ring thereby inducinglcurrents in the induction coils on: these other pole pieces. At the same-- time, theteeth of the first-men:

'tioned sideof the inductor, pass from the corresponding pole pieces, thereby opening the magnetic circuits formed therethrough as first described Inasmuch as the-teethand the spaces between the: same on: both sides-of the v inductor are the'same, and inasmuch further was;

that the action ozt thegenerator is virtually the; action of an: alternating, current transformer or c'on-ve rter,v with the consequent automatic adjustment- 01E curreiitto load upon short circuit- Changes and, modifications can; be made with theinner endsof said magnets Without departing from the spirit of the invention.

WVe claim:

1. In an electrical generator, the combination or a series ofprimary coils arranged about a center, cores within the coils with like poles connected to a holder, a pole piece secured to eaclr holderand projecting toward the center, a secondary coil about each pole piece, and a rotary inductor moving in p'roximity'to all of said pole pieces.

2. The combination of a series of primary coils, cores for saidcoils, having their poles alternating duplex pole pieces in magnetic relation to said cores, said duplex pole pieces being arranged side by side, secondary coils about each ofthe pole pieces, and a duplex inductor, the two sides of which have altern'a-teteeth and: notches. which move in proximity to the polepieces. Y

31 The comb'nation of a ring; provided with a series of coils forming, pole pieces at intervals, a series of cores each associated with one o f-said pole: pieces andzeach provided with two separated portions projectinwardly,- generating coils around said projections, and a: centrally disposed: rotary I inductor having two setsof teeth, whereof the teeth in each set are staggered.

i. A generator comprising a ring magnet with poles'at intervals, each pole-being pro-v vided with two: pole pieces, one on:- each side of the ring, and a rotary centrally disposed inductor constructed with twomembers arranged side by side, said members having teeth of the same size and Separated" by spaces of the same size, the teeth of the two members being staggered with reference to one another thus to maintain the areaof the inductor presented to each pair of pole:

piecesconstant. r

5. A device of the class specified comprising a series of U-shaped magnets arranged radi ally in annular order with their legs extending inwardly, and a; rotary inductor arranged centrally within saidseries of magnets and comprising; tWosets of inductor members arranged in staggered relationship, said inductor members cooperating 6'. Adevice of the class specified comprisaring shaped member provided at intervals witlr magnetic coils, U-shaped magnets Lcarrled by said member and havingtheir middle portions secured to said member be-- tween the coils thereof, and their legs extending radially inward, and a rotaryinduc torimember provided withtwosets of projections which saidprojections cooperate With the inner ends otsaidU-shaped' mag nets;

7.- A device Oil/he class specifiedlcomprising a: ring shaped member-provided at intervalswith magnetic GOll-Syu shapedi electromagnetscarriediby' said member and 1193 -3 ing their middle portions secured to said In witness whereof, we hereunto subscribe member between the coils thereof, and their our names this 2d day of April A. D., 1906. 10 legs extending radially inward, and a rotary WILLIAM D. PENN INGTON. inductor member rovided wlth two sets of projections which said projections cooperate JOHN PENNINGTON' with the inner ends of said U-shaped mag- Witnesses:

nets, the projections of said two sets being A. MILLER BELFIELD,

staggered with reference to one another. I. 0. LEE.

Copies of thin pltent my be obhined for five cent each, by oddreulng the "Gommiuioner ot l'atentl, Washington, D. 0. 

